Type bar releasing device for typewriters



May 13, 1947. c. RIZZUTO 2,420,445

TYPE BAR RELEASING DEVICE FOR TYPEWRITERS Filed Dec. 26, 1945 2 Sheets-Sheet 1 INVENTO/F 6". R/ZZUTO 7 4 M B7 Arm/ma? May 13, '1947. zzu-rb 2,420,445

TYPE BAR RELEASING DEVICE FOR TYPEWRITERS Filed Dec. 26, 1945' 2 sheets she-en 2 Q-I i J H 27 Ta +5 M/VE/VTO/P A TTO/iNEf Patented May 13, 1947 UNITED TYPE RELEASING DEVICE FOR TYPEWRI'I'ERS Gharles Rizzuto, Brooklyn, N. Y. Application December 26, 1945, Serial No. 637,172

6 Claims.

This invention relates to typewriters and more particularly to a device for releasing type bars which become caught during operation of the typewriter.

When a typewriter is in use the type bars sometimes become caught against each other and hung, thus making it necessary for the typist to pull the type bars loose from each other for return to a normal position before operation of the typewriter can be continued. This is annoying and often causes the finger used for releasing the type bars to be soiled and this will cause paper to be dirtied while being placed in the machine.

Therefore it is one object of the invention to provide a typewriter with an attachment by means of which hung type bars may be easily and quickly released and allowed to drop back to a normal position.

Another object of the invention is to provide an attachment for releasing stuck type bars so constructed that by pressing upon a single stem or plunger all keys which may have become stuck may be released, thus making it unnecessary to provide a release for each type bar.

Another obect of the invention is to provide a releasing mechanism which maybe incorporated in a typewriter of conventional construction, thus making it unnecessary to make changes in the construction of a typewriter in order to install the improved type bar releasing mechanism.

The invention is illustrated in the accompanying drawings wherein:

Fig. 1 is a view partially in side elevation and partially in section, showing portions of a typewriter of conventional formation and the improved type bar release incorporated in the typewriter. 2

Fig. 2 isa fragmentary perspective View showing a portion of a typewriter equipped with the improved type bar releasing mechanism.

Fig. 3 is a view similar to Figure 1 showing the type bar swinging'upwardly to a raised position.

Fig. 4 is a fragmentary sectional view taken on line 4-4 of Figure 3.

Fig. 5 is a fragmentary sectional view on an enlarged scale taken along the line 5-5 of Figure 4. w i

The-typewriter which is indicated in gene 1 by the numeral I is of conventional formation and has the usual casing 2. The customary number of type bars 3 are provided, and each type bar extends from a plate 4. The plates are of substantially triangular shape and mounted for tilting movement upon a rod 5 extending transversely of the frame or casing 2. The keys 6 are 2 mounted at front ends of the usual key bars 1 which are pivoted upon a rod 8 mounted transversely of the casing and at their rear ends the key bars are pivoted to the plates, as shown at 9, so that when the keys are struck and the plates rocked about the rod 5 the type bars will be swung upwardly and towards the platen or roller [0 of the typewriter in the usual manner.

A rod or bar H extends transversely of the casing near the top of the rear portion thereof and is rotatably mounted between side walls of the casing. Arms I2 which are rigid with the bar ll extend downwardlythereirom and have their lower ends engaged with ends of a rod [3. The rod l3 constitutes an anchor for the rear ends of rods M which have their front ends pivoted to the plates 4 and their rear ends bent to-form hooks I5 Which'engage about the rod IS. A helical spring I6 is coiled about each rod I4 and has its front end fixed to the rod, as shown at IT. The strand of resilient wire from which each spring is formed has a portion extending rearwardly from the spring to provide a stem l8 and the stem has its rear portion bent to form a hook it engagedthrough an eye 20 carried bythe rear wall 2| of the casing 2. A separate eye 20 is provided for engagement by the hook of the stem projecting rearwardly fromithe spring mounted about the rod 14 of each plate 4 and when any one of the keys 6 is struck to tilt the bar I and swing the companion type bar 3 upwardly to the position shown in Figure 3, its companion rod [4 will be shifted forwardly to exert pull upon the rod 53 and the arms l2 will be swung forwardly. At the same time the spring l6 will be expanded, and when pressure upon the key is removed the sprin will contract and return the key and the type bar to the normal position shown in Figure 1. It sometimes happens that type carried by the type bars will catch against each other and pile up so that the type bars remain hung in a raised position, and when-this occurs the operation of the typewriter must be stopped until the hung type are released from each other and the type bars allowed to move back to the normal position. An ear 22- extends outwardly from a side of one of the arms l2 and through this ear or lug passes the rear portion of a rod or plunger 23 carrying washers-or collars, 24 and 25, the col-- lar 24 being in fixed position upon the rodand the collar 25 being threaded upon the rod and held in place by a cotter key 26. A button 21 is at the front end of the rod 23 and when the type becomes hung it is merely necessary to thrust the rod rearwardly by pressure of a finger against 3 the button 2'! and the arms l2 will be swung rearwardly and carry the rod 13 with them.

During this movement pull will be exerted upon the rods M of the type bars which have become hung and the plates 4 will be swung about the rod 5 and the stuck type will be loosened and the type bars 3 swung forwardly and downwardly to the normal position. It will thus be seen that when a typist is operating a typewriter and the type becomes hung it is merely necessary to press a finger against the button 21 and the hung type will be released and quickly returned to the normal position. This saves the trouble of releasing the hung type with a finger engaging the type themselves and allows the typewriter to be restored to working order very easily and very quickly.

Having thus described the invention, what is claimed is:

1. A typewriter comprising a casing having front and rear walls, eyes projecting forwardly from the rear wall, a platen, type bars pivotally mounted for swinging movement from a reclining position towards the platen, key bars pivotally mounted in said casing and having their rear ends pivoted to the type bars, a shaft rotatably mounted in the casing transversely thereof back of the type bars, arms extending downwardly from said shaft, a rod carried by and extending between the lower ends of said arms, rods pivoted to the inner end portions of the type bars and extending rearwardly therefrom and having their rear ends formed with hooks engaged about the rod carried by said arms, springs coiled about the rods extending rearwardly from the type bars and having rods extending rearwardly from them and formed with hooks engaged through the eyes projecting forwardly from the rear wall of the casing, an ear projecting laterally from one arm, and a rod for releasing type bars hung in a raised position slidably passing through the front wall of the casing and having a finger-engaging button at its front end and having its rear end portion slidably passing through the ear and provded with collars located in front of and rearwardly of the ear.

2. In a typewriter, a casing having front and rear walls, a platen, type bars in said casing pivoted at their rear ends and having their rear ends provided with depending plates, key bars pivotally mounted in the casing under the type bars and having their rear ends pivoted to theplates of the type bars, a shaft rotatably mounted in the casing transversely thereof, a rod carried by said arms and extending between the same, rods pivoted to the plates of the type bars and extending rearwardly therefrom and having hooks at their rear ends engaged about the rod carried by said arms, springs carried by the rods extending rearwardly from the type bars and having portions extending rearwardly therefrom and anchored to the rear wall of the casing, and a rod for freeing hung type bars slidably passing through the front wall of the casing and having its rear end connected with one arm and its front bars towards the platen when the front ends of the key bars are depressed, arms disposed vertically in the casing and pivotally mounted at their upper ends, a rod carried by and extending between said arms, rods extending rearwardly from the type bars and engaged with the rod carried by said arms, springs yieldably holding the type bars in their normal position, an ear carried by one arm, and a rod slidably mounted through the front wall of the casing and having its rear end portion passing through said ear and carrying abutments between which the ear is located.

4. In a typewriter, a casing having a front wall, a platen, type bars mounted for movement towards and away from said platen, key bars pivotally mounted and connected with the type bars for moving the same towards the platen when keys at the front ends of the key bars are depressed, arms disposed vertically in said casing and pivotally mounted, a rod carried by said arms, rods extending from the type bars and loosely engaged with said rod, springs yieldably holding the type bars in a normal position, a releasing rod slidable longitudinally through a front wall of said casing and having a fingerengaging button at its front end, an ear projecting from one arm, the rear end portion of said releasing rod being passed through said ear, a collar carried by said releasing rod in front of said ear, and a fastener carried by the releasing rod back of said ear.

5. In a typewriter, a casing having a front wall, a platen, type bars mounted for movement towards and away from said platen, key bars pivotally mounted and connected with the type bars for moving the same towards the platen when keys at the front ends of the key bars are depressed, arms disposed vertically in said casing and pivotally mounted, a rod carried by said arms, rods extending from the type bars and loosely engaged with said rod, springs yieldably holding the type bars in a normal position, and a releasing rod slidably mounted through the front wall of said casing and having its rear end connected with one of said arms.

6. In a typewriter, a casing, a platen, type bars mounted for movement towards and away from said platen, key bars pivotally mounted and connected with the type bars for moving the same towards the platen when keys at front ends of the key bars are depressed, arms disposed vertically in said casing and pivotally mounted, a rod carried by said arms, rods extending from the type bars and loosely engaged with said rod, springs yieldably holding the type bars in a normal position, and means for swinging the arms and the rod carried thereby rearwardly and exerting pull upon the type bars to return hung type bars to normal position.

CHARLES RIZZU'I'O.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 979,731 Barron Dec. 27, 1910 1,076,276 Fricks Oct. 21, 1913 1,689,888 Myers et a1 Oct. 30, 1928 

